Analysis of the atomic geometries of the (101-bar0) and (112-bar0) surfaces of CdSe by low-energy-electron diffraction and low-energy-positron diffraction.
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Journal Article↗
Biomedical subjects
K Stevens
Publications and source records attributed to K Stevens.
A monoclonal antibody recognising an epitope associated with pig interleukin-2 receptors.
A monoclonal antibody is described which recognises an epitope associated with a receptor for interleukin-2 (IL-2) on pig lymphocytes. The monoclonal antibody inhibits high affinity binding of radiolabelled recombinant human IL-2 (rhIL-2) by pig lymphoblasts and also non-competitively inhibits both pig-TCGF and rhIL-2 maintained proliferation. By flow cytometry the antigen is apparently not present on freshly isolated blood lymphocytes but is detectable on small cells between 6 and 12 h after activation and on large cells by 24-h. These findings are comparable with those obtained using monoclonal antibodies recognising the 55 kDa alpha chain of the human and mouse IL-2 receptor (p55, TAC) expressed on activated cells in vivo and in vitro. However, the molecular weight of the porcine antigen is between 65 and 70 kDa.
Animals↗
Coincidental finding of May-Hegglin anomaly in a patient with end-stage renal failure.
We present two cases of May-Hegglin anomaly incidentally discovered in a patient and his brother during investigation of the patient for end-stage renal failure and workup for renal transplantation. Routine laboratory tests were performed and included a basically normal clotting profile. Ultrastructural studies of the May-Hegglin inclusions proved diagnostic, findings were compared with those of two similar granulocyte inclusion bodies, and nomenclature discrepancies that still exist in most references are again emphasized. The finding of the May-Hegglin anomaly in our patient appears to be incidental to the underlying renal disease. A successful renal transplant has been carried out in this patient. We now report on a patient and his brother in which the MHA was discovered during workup of the patient for end-stage renal failure and renal transplantation. No association between the underlying renal disease and the MHA could be demonstrated.
Bleeding Time↗
[Doppler echocardiography imaging of construction-induced regurgitation of technical heart valve prostheses].
The normal leakage flow in modern technical heart valve prostheses can be visualized by color-coded Doppler-echocardiography, provided that an adequate ultrasonic image quality can be achieved. Sometimes it may be difficult, however, to distinguish such a normal leakage flow from pathological regurgitation. We therefore mounted new specimens of five different types of prostheses (Bjørk-Shiley monostrut, Medtronic-Hall, Omnicarbon, Saint Jude Medical, Duromedics) into an invitro model, where the leakage flows could directly be visualized as emerging water jets. When the system was completely filled, the jets could also be registered by two-dimensional Doppler-echocardiography. For each valve, characteristic patterns for the localization of the principal jets were found. Besides the relative broad central jet in the Medtronic-Hall valve, all other jets arose mainly at the ring. They were detected at the hinges or the basis of the larger struts, respectively, and with asymmetrical mono-disc valves at the side of the smaller opening. The length and the orientation of the jets were found to change significantly with minimal variations of the position of the closing discs. This variability could be confirmed, when in a separate model the overall leakage flows were repeatedly measured. For patient examinations it seems useful to refer mainly to the localization of the jet origins. The comparison with reference values of jet-dimensions in Doppler images will rarely enable the examiner to distinguish between normal and pathological jets.
Echocardiography, Doppler↗
Unusual structure of the exopolysaccharide of Rhizobium leguminosarum bv. viciae strain 248.
The exopolysaccharide from R. leguminosarum bv. viciae strain 248 differs from those of other Rhizobium strains with similar symbiotic behavior. 13C-N.m.r. spectroscopy of fragments generated by partial hydrolysis, together with methylation analysis and 13C-n.m.r. spectroscopy of the enzymically depolymerised exopolysaccharide, indicated the following nonasaccharide repeating-unit: [formula: see text] The locations of the acetyl and 3-hydroxybutanoyl substituents in the exopolysaccharide are assigned provisionally. R. leguminosarum bv. viciae strain 248, cured of its Sym plasmid pRL1JI, synthesised an exopolysaccharide in which the sites and degree of substitution were unchanged. A Tn5 mutant, derived from strain 248 and unable to induce nodules, synthesised small amounts of EPS that lacked galactose.
Carbohydrate Sequence↗
Trisomy 5 in Ph+ chronic myeloid leukemia in association with megakaryocytosis.
A patient with a megakaryocytosis associated with a Philadelphia chromosome-positive chronic myeloid leukemia (CML) was found to have a trisomy of chromosome five. To our knowledge, this is the first case of trisomy 5 associated with a Ph + CML, particularly one with a megakaryocytosis. The trisomy 5 may be associated with the resistance to cytostatic drugs found in this patient.
Chromosomes, Human, Pair 5↗
Sister chromatid exchanges in lymphocyte cultures of patients previously treated with dibromodulcitol.
Acute non-lymphatic leukaemia and myelodysplasia occur in a larger percentage of patients treated with dibromodulcitol (DBD) than in patients treated with other cytostatics. Sister chromatid exchanges (SCE) in the lymphocytes in peripheral blood as well as other haematological parameters were measured in women with breast cancer to investigate whether women who had previously been treated with DBD as a part of their treatment regime had an increased frequency of SCE or another haematological abnormality attributable to DBD. SCE levels were elevated in women treated with DBD as well as in those treated with other cytostatics compared to the untreated control group. All other haematological parameters were normal. There was no significant difference in the number of SCEs between the patients who received DBD and those treated with other cytostatics. The increased frequencies of SCE in the treated patients are attributable to various cytostatic agents, and there is no significant permanent increase in the frequency of SCE after exposure to DBD.
Breast Neoplasms↗
The carpal tunnel syndrome in cardiologists.
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Cardiology↗
Patients' perceptions of music during surgery.
Music, as an aesthetic and symbolic medium, has the ability to dispel much of the fear and anxiety associated with facing the unknown alone. As such it is an ideal support for patients undergoing surgery where a non-general anaesthetic is administered. However, it is important to consider whether, from the patient's perspective, the inclusion of music in such a situation is considered to be helpful. A pilot study conducted at an acute hospital involved interviewing 25 patients who, through an attitudinal scale and their interview responses, revealed positive support for the music that they listened to during their operation. Their remarks focused on the ability of the music, as a familiar personal and cultural medium, to ease their anxiety, to act as a distractor and to increase their threshold of pain. From a nursing perspective, such an application of music as therapy to reduce fear and anxiety may be viewed as being highly relevant to the work of the anaesthetic nurse, with regard to a more individualized and holistic approach to patient care.
Attitude to Health↗
Truth telling in the case of an infant with multiple congenital anomalies.
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Abnormalities, Multiple↗
Observation of differences between low-energy electron- and positron-diffraction structural determinations of the cleavage faces of CdSe.
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Journal Article↗
MoD grant to Bristol veterinary school.
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Animal Husbandry↗
Aspergillus brain abscess. A case report.
The history and findings in a patient with erythroleukaemia who developed a fungal brain abscess during the agranulocytic phase of induction treatment is reported. The radiological features of fungal infection are reported, with emphasis on the importance of clinical judgement in making the diagnosis. The autopsy findings further illustrate the increasing importance of this previously very rare condition.
Adult↗
[Typhoid fever presenting as histiocytic medullary reticulosis: a case report].
Because of a pancytopenia, moderately cellular bone marrow with hypoplastic erythropoiesis but with active granulo- and thrombopoiesis and a conspicuous increase in histiocytic cells, a patient was provisionally diagnosed as having histiocytic medullary reticulosis. However, Salmonella typhi was cultured from blood, urine and stool specimens. After 3 weeks the Widal reaction showed a titre of 1/320 for the H-antigen and 1/1,280 for the O-antigen. The patient was treated with chloramphenicol for 10 days and the fever, enlarged spleen and enlarged lymph nodes returned to normal.
Diagnosis, Differential↗
Granulocytic sarcoma of the kidney in a patient with acute myelomonocytic leukaemia. A case report.
A 26-year-old man with acute myelomonocytic leukaemia had been in remission for 16 months when he developed a painful swelling of the right testis. Intravenous pyelography showed a non-functioning right kidney. Surgical exploration revealed a granulocytic sarcoma of the right kidney and a right nephrectomy was performed. The patient refused further treatment and relapsed 3 months after the nephrectomy. Autopsy revealed a large greyish-white tumour mass occupying the pelvis and retroperitoneal tissue. Special techniques with immunoperoxidase and naphthol-ASD chloro-acetate esterase staining confirmed the histological diagnosis of granulocytic sarcoma. The literature is reviewed and the rarity of this case is discussed.
Abdominal Neoplasms↗
Diagnosis and treatment of the inferior vena cava syndrome in advanced malignant disease.
The syndrome of intrahepatic inferior vena cava obstruction has neither been commonly recognized nor adequately described. Symptoms include the abrupt onset of ascites, hepatomegaly, and fluid retention below the diaphragm with edema of the lower extremity. Proteinuria can be associated with these symptoms. When this syndrome has been caused by malignant hepatic enlargement, it has not been well characterized in the literature, and its treatment has been ignored. We have diagnosed the inferior vena cava syndrome due to metastatic liver involvement in 34 patients before death. Thirty-three of these patients were treated using a combination of strip radiotherapy to the hepatic vena cava, with or without hepatic arterial infusion of chemotherapy. Fifty-six percent of the patients completed a full course of radiotherapy, with an 83 percent response rate. A dose of 3,000 to 4,500 rads was found to be safe and provided excellent palliation of ascites and edema. Tumors known to be radiosensitive had the best responses and side effects were few and mild in nature. Recognition and treatment of this condition will assume greater importance as survival is prolonged in more patients with advanced malignancy.
Breast Neoplasms↗
Improved survival for soft tissue sarcoma of the extremities by regional hyperthermic perfusion, local excision and radiation therapy.
Soft tissue sarcomas continue to present problems with both local control of disease and death from distant metastases after accepted surgical therapy. Multimodality management has been established in the literature to be superior to traditional therapy of wide excision or amputation. The results of the treatment of 64 patients at Oregon Health Sciences University using regional hyperthermic perfusion with l-phenylalanine mustard and actinomycin D, wide local excision and external radiation therapy are reviewed. Histologic tumor types included: 19 liposarcomas, 14 malignant fibrous histiocytomas, eight fibrosarcomas, five leiomyosarcomas, four malignant schwannomas and 14 other sarcomas of the extremities. Minimum follow-up study has been 24 months and the mean follow-up time is more than five years. One-third of the patients presented with local recurrent disease after unsuccessful primary treatment. Over-all local recurrence for all patients treated by a combination of the aforementioned modalities was 3.4 per cent at two years and 11.1 per cent at five years. The over-all survival rate for all patients was 88 per cent at two years and 67 per cent at five years compared with a published over-all five year survival rate of 41 per cent. Patients with malignant fibrous histiocytomas had both two and five year local recurrence rates of 7.7 per cent and survival rates at two and five years of 79 and 63 per cent, respectively. This is compared with a previously published over-all five year survival rate with malignant fibrous histiocytomas of 46 per cent. The results with the treatment of liposarcomas were also superior to the published literature. Not only are the treatment results with regional hyperthermic perfusions excellent for both primary and locally recurrent sarcomas of the extremities, but limbs previously considered unsalvagable can be spared.
Adolescent↗
An assessment of the prevalence of hepatitis B among health care personnel in Victoria.
The prevalence of past infection with hepatitis B virus in health care personnel was investigated by questionnaire and by a serological survey of personnel in a representative selection of Victorian hospitals and institutions. According to the available data, hepatitis B does not appear to have been a major infection problem among health care personnel in Victoria. The only occupational group that clearly is at an increased risk of acquiring the infection is the dental profession. Nursing staff members in institutions for the mentally retarded may also be at a higher risk. The findings of this investigation were used as a basis to frame recommendations for the vaccination of health care workers in Victoria against hepatitis B.
Australia↗